Machine for skinning fat.



P. M. SALMON.

MACHINE FOR SKINNING FAT.

APPLICATION FILED MAY I5. 1918,

Patented Jan. M, 1919.

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MACHINE FOR SKINNING FAT.

APPLICATION FILED MAYI5, I918.

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Patented Jan. 14, 1919.

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PATRICK M. SALMON, OF SDU'IHBORD, MASSACHUSETTS.

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tpecliflcatlon ct letters Patent. Patmpy am pg; pgpw hpplteadon tiled may it, Wit. Serial No. 23 L733.

To all whom it may concern:

Be it known that l, Permian ll l. Sermon, a citizen oi the United States, residing at @outhhoro, in the county oi Worcester and State of Massachusetts, have invented new and useful improvements in Machines for Shinning Fat, at which the tollowing is a specification.

llhis invention is an improved machine for removing the shin from tat, especially pieces of porh fat, the object of. the invention heing to provide an improved machine oi this character which is automatic in op eration and which embodies a hnite tor separating the lat from the shin and also emhodies' a cylinder mounted for rotation and gripping means carried hy the cylinder and which serve to grip the shin so as to hold the lat pieces on the cylinder and cause the cylinder hy its rotation to teed the pieces to the knife so that the lmite serves to separate the fat from the shin.

another object of the invention is to sheet,

improvements in the shin gripping means. Another ohiect is to edect improvements in the means for operating the shin gripping means. 7

With the above and other ohjects inview,

the invention consists in the construction,

comhination and arrangement of devices hereinafter descrihed and claimed.

in the accompanying drawings Figure l is a front elevation of the lat shinning machine constructed and arranged in accordance with my invention.

Fig. 2 is a side elevation oi the same partly in section.

lBig. 8 is a detail elevation, partly in section, and showing onset the gripping hooh operating cams and its connections.

l ig. 4k is a detail elevation of the same, showing the opposite side oil the cam and showing the cylinder shalt in cross section.

lBig. 5 is a detail sectional Vl BWytlll a larger scale, oi? the conveyer cylinder or roll and the shin gripping and tat cutting machanism.

Fig. t is a similar view of the same and showing a piece oil i'at porh as being carried by the conveyer roll or cylinder and gripped hy the gripping mechanism thereolt.

Fig. 'l is a detail plan ol the conveyer roll and the gripping mechanism and showing the gripping hooks and plate in initial posia then.

Fig. 8 is a similar view oi the same and showing the gripping hooks and plate in gripping posltion.

F1g. 9 1s a detail sectional view of the same. .s Fig. 10 is a similar view of the same showmg the gripping hooks and plate in gripping position.

Fig. ll, is a similar view of the same and showmg the operation of the knife.

Fig: 12 is a sectional view on the plane indicated by the line 12-l2 of Fig. 7 and on a larger scale.

The frame 1 may he ol the construction here shown or of any suitable construction and is provided with hearings 2 in which the shalt 3 of the conveyer roll or cylinder 41: is mounted. At opposite sides of the trams l are arched supports 5 which are holted thereon as at 6 and which are spaced from the ends of the conveyer roll. h hniie 't' for cutting the shin from the fat is arranged with its cutting edge 8 near the periphery of the conveyer roll, the said lmite extending longitudinally of the conveyer roll and being secured on the supports 5 by bolts 9., the said supports heing also provided with adusting screws 10 which hear against the under side of the knife and which coact with the bolts 9 to enahle the hnile to he adjusted to any desired angle with respect to the conveyer roll.

. To one end of the roll shalt 3 is secured a spur gear ll, said spur gear being engaged by a pinion 12 of a driving shalt l3. @aid driving shaft is mounted in a suitable hearing it and is provided with a belt pulley 15. Un the supports 5 are guiding standards 16 each of which has a vertical guideway 1?.

Blocks 18 are movable vertically in said guideways and are provided with hearing openings in which the ends of the shalt 19 .ot a presser roller 20 are mounted.

When the machine is in operation, the conveyer roll rotates in the direction indicated by an arrow in Figs.'2 and 5. Se cured to the shaft 3 for rotation therewith are carrier bars 21 which are arranged see the ends of the conveyer roll and are provided on their outer sides with guides 22 in which the arms 23 of a gripper bar 2d are slidably mounted, the said arms having widened central portions 25 provided with slots 26 through which the shalt 3 extends. @aid slots are shown in dotted lines in Figs. 2 and 3 and serve to enable the arms 23 to clear the conveyer roll shalt. 'lhe till hit

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arms 23 of the gripper bar are provided with tappet rollers 27. Cams 28 are arranged concentrically of the shaft 3 and are fixedly secured. Each cam is segmental in form. and is provided on one side with a member 29. Said member has a cam flange 30 which is spaced from one side of the cam and in coaction therewith forms a cam slot 31 which has a segmental central portion 32 and end portions 33, 34 which are offset from the central portion, the opposing side of the cam having a segmental face 35 which is concentric therewith and of less diameter than the cam and the cam also having offset shoulders 36, 37 which correspond with the offset faces 33, 34 of the member 29. The gripper bar is provided with a series of gripping hooks 38 which pass therethrough and are adjustable and secured by nuts 39, the said gripping hooks also passing through radial openings in the conveyer roll as indicated at 40, the heads of the points 41 of the gripping hooks extending toward the front end of the machine when they are on the upper side of the conveyer roll.

The cam ways 31 are on the under side of the conveyer roll and it will be understood that during a portion of each rotation of the conveyer roll said cam ways 31 cause tho-tappet rollers 27 which operate therein to move the arms 23 downwardly so that the gripper bar 24 moves the gripping hook downwardly to gripping position, and the concentric and small diameter portion 35 of the cams holds the gripping hooks in gripping position until the tappet' rollers 27 reach the ofisets 36, 37, said offsets of the earns then. serving to move the gripping hooks outwardly to release position. Such movement of the gripping hooks occurs during the time while they move from a position immediatelyabove the center of the conveyer roll to a point on the under side of the conveyer roll and near the front end of the machine.

A pair of gripping plates 42, 43 are also provided. The gripping plate 42 is fixed to the conveyer roll and is arranged in a recess therein and extends longitudinally thereof and has its outer face arranged flush with the periphery of the conveyer roll. Said plate is provided in its rear side with V- shaped points or teeth 44 between which the gripping hooks 41 operate. Said plate 42 is also provided with recesses 45 between the ward and from the plate 42 and is provided with blunt pointedteeth 47 which are directed toward the plate 42.

,eeaive Links 48 are pivotally connected as at 49 to the movable gripping plate 43 and are arranged for movement in recesses 50 with which the conveyer roll is provided, said recesses being covered by plates 51. Bell crank levers 52 are pivotally mounted at the inner side of the conveyer roll as at 53 and have short arms 54 which are engaged in slots 55 with which the links are provided near their free ends. The long arms 56 of the bell cranks are provided at their outer ends with notches 57 and the gripper bar 24 is provided with tappets 58 which engage in the said notches so that the bell cranks are connected to the gripper bar for operation thereby.

The operation of the fat skinning machine is as follows: When the conveyer roll is in the position shown in Figs. 2 and 5 with the gripping hooks on the upper side of the roll and in raised position, a piece of fat pork is placed by the operator on the conveyor roll with the skin side next thereto and with the end under the gripping hooks. As the conveyer roll revolves in the direction indicated by the arrow in said figures the gripper hooks are pulled down through the fat indicated at a and to the sln'n indicated at b and as this occurs the bell crank levers are partly turned by the movement of the gripper bar 24 toward the center of the conveyor roll, so that the arms 54 of the bell crank levers coact with the links 48 to move the gripping plate 43 toward the relatively fixed plate 42 and hence the skin is not only gripped and held by the heads of the hooks and forced down into the recesses 45 but is also gripped between the teeth or points of the plates 42, 43 and so securely held. After the skin is thus gripped the pork passes under the presser roll 20 and engages the knife 8 the knife serving to separate the fat from the skin, the fat passing over the knife and the skin staying with the conveyer roll until the latter has nearly completed one revolution when the cams and coacting devices then serve to move the gripping hooks outwardly and to also move the movable gripping plate 43 from the relatively fixed gripping plate 42, thus releasing the skin and permitting the same to drop. v a

A rock shaft 59 is mounted in bearings 60 on the front portion of the frame 1 and is provided with hooks 61, the points of which extend toward the conveyer roll. Said rock shaft. is also provided with an arm 62 to which a spring 63 is attached said spring serving to turn the rock shaft in the required direction to move the hooks from the conveyer roll.

The rock shaft is also provided near one end with arock arm 64, which rock arm has a tappet roller 65. A cam 66 is secured to, the corresponding end of the conveyer roll,

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to ti neonate at a suitable point, and serves when it reaches the roller 65 to turn the rock shaft and move the points oi the hook 61 toward the conveyer roll. 7

The said rock shaft 59 with its hooks 61 serves to pull the skin from the drum after the skin has been released by the gripping devices.

While l have herein shown and described claims.

Having thus described my invention, ll claim v l. lln a machine oil the class described, a conveyer roll, skin gripping hooks carried by the roll and arranged for radial movement with respect thereto, an element an ranged within the roll for movement toward and from the periphery thereof and. to which said hooks are secured, a relatively fixed element carried by the roll and having skin gripping teeth between which the hooks are arranged, an element and movable toward and from said relatively fixed skin gripping element, said movable element also having skin gripping teeth, means to actuate the first named e1ement, bell crank levers operated by the first named element and links connecting said bell crank levers to said movable elements to cause the latter to be actuated simul-' taneously, with the hooks.

2. lln a machine of the class described, the combination of a conveyer roll, means to revolve the same, a knife held in fined relation to the conveyor roll, a presser roller,

skin grlpping means carried by the conveyer roll,

means to automatically operate the skin gripping means to'cause the same to rst grip and then release the skin, and means to pull the skin from therollatte'r the skin has been released,

3.. lin a machine ot the class described, a

carried by theroll conveyer roll, a knife, a presser roller, skin gripping hooks carried by the conveyor roll and movable radially with respect thereto, means to automatically actuate said hooks during each rotation of the conveyor roll, and means carried by the roll and coacting with the hooks to grip the skin before the fat is presented to the knife and to release the skin after the tat has been cut from theskin by the knife,

4t. ln a machine ot the class described, a conveyer roll, skin gripping hooks carried by the roll and arranged for radial moveelement carried by the roll and having skin gripping teeth between which said hooks are arranged, an element carried by the roll and movable toward and tom said relatively fined skin gripping element, said movable element also having skin gripping teeth, and means to operate said hooks and said movable skin gripping element.

5. in a machine of the class described, a conveyor roll mounted for rotation, an element arranged within theroll and mounted for radial movement toward and from the periphery of the roll, said element being provided with skin gripping hooks and said hooks extending through the periphery of the roll and having pointed heads, tappets with which said element coacting with said tappets to automatically till 'ment with respect thereto, a relatively fired is provided, cams move said element in the required directions at each rotation of the roll, fixed skin gripping teeth carried by the roll and between which said hooks are arranged, a skin gripping plate carried by the roll, movable to ward and from said teeth and also having teeth directed toward the first named teeth, links connected to said movable plate, and bell crank levers pivotally mounted in the roll and each having an arm one ol the links and also havin nected to said radially mova element,

an arm cohle gripping connected to/ in testimony whereof ll aiiin my signature.

rarnrckir. satires; 

